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Showing 1 to 11 of 11 for “"MCrAlY"”.
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Neue Verfahren zur Analyse des Verformungs- und Schädigungsverhaltens von MCrAlY-Schichten im Wärmedämmschichtsystem
… properties within the coating system of the MCrAlY bond coat have been investigated using a double shear creep testing assembly, especially developed for thermal barrier coatings. Parameters to describe primary and secondary creep for the temperature range 750°C - 1050°C were acquired on …
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Influence of composition and processing on the oxidation behavior of MCrAlY-coatings for TBC applications
… in the oxidation behavior and scale adherence on MCrAlY-bond coats. For this purpose, three MCrAlY-coatings were selected and subjected to oxidation tests at high temperature in the form of TBC systems, overlay coatings and free-standing coatings. The first part of the work treats the influence of …
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Untersuchungen zu den Versagensmechanismen von Wärmedämmschicht-Systemen im Temperaturbereich von 900 C bis 1050 C bei zyklischer Temperaturbelastung
… zone between the substrate and the MCrAlY bond coating. It can be distinguished between two cases. At a low activity of chrome in the MCrAlY, the carbon from the substrate can diffuse into the bond coating and leads there to local precipitations of chromium-carbide, that doesn't …
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Einfluss der Bondcoatzusammensetzung und Herstellungsparameter auf die Lebensdauer von Wärmedämmschichten bei zyklischer Temperaturbelastung
… CO2 separation, on the oxidation behaviour of MCrAlY alloys was investigated. In water vapour containing atmospheres the hydrogen increases the weight gain by increasing the solubility and diffusivity of oxygen in the alloy. Similar observations were made in strongly reducing atmospheres (e.g. …
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Air Plasma Sprayed Thermal Barrier Coatings: Experiments and Finite Element Analysis
… of a nickel-based super alloy substrate, a MCrAlY bond coat, a thin layer of thermally grown oxide (TGO) which thickens during service, and an air-plasma sprayed yttria-stabilized zirconia (YSZ) coating. </p> <p> Growth of the TGO layer, rumpling, and aluminum depletion from the bond coat …
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Anwendungsgrenzen von modernen Nickelbasis-Superlegierungen in effusionsgekühlten Bauteilen zukünftiger Gasturbinen
… variants was demonstrated. Bond coating of MCrAlY on single crystal specimens seemed to have a positive effect on life time compared to directionally solidified variants. The difference in the materials behaviour could be clearly demonstrated by a comparison between the homogeneous …
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Finite element simulation of stress evolution in thermal barrier coating systems
… data of thermo-mechanical properties of CMSX-4, MCrAlY (Bond Coat) and APS-TBC (partially stabilized zirconia), were implemented into an FE-model in order to simulate the stress development at the metal/ceramic interface. The FE model reproduced the specimen geometry used in corresponding …
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Interdiffusion Analysis For Nicocraly And Nial Vs. Various Superalloys
Hot section components in gas turbines can be NiCoCrAlY-coated to provide the component with an Al reservoir that maintains a protective oxide layer on its surface. Over the service life of the component, the coatings degrade by composition and phase changes due to oxidation/hot-corrosion, and …
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High temperature corrosion in gas turbines : thermodynamic modelling and experimental results
The introduction of new materials as well as the improvements in fuel quality have raised a need for re-evaluation of the hot corrosion risk in industrial gas turbines. In this study, the risk of hot corrosion was determined using thermodynamic modelling for different impurity-contents and …